In SDL Web 8.1, it is not possible to have multiple content delivery environments rolled up in one purpose within a topology type. It is possible in the SDL Web 8.5 release, currently available. As a workaround, multiple purposes can be implemented for a single topology type, and content editors can be instructed to use these purposes.
As a workaround, it is still possible to enable the legacy publishing method and configure a single publishing target which has two destinations. The Deployer microservices still should be used, but can create old publication targets and point to more than one deployer accordingly).
http://docs.sdl.com/LiveContent/content/en-US/SDL%20Web-v1/GUID-2B10C8D8-BB61-4CCE-98E7-A0F9AAF33929 See below KB article regarding Web 8.5 multiple destination publishing.
In SDL Web, how to configure multiple destination publishing?
